Mail convenience center



FIG. 1 is a top front perspective view of a mail convenience center showing my new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevation thereof;

FIG. 5 is a side elevation as seen from the opposite of FIG. 4; and

FIG. 6 is a rear elevation thereof. 

The ornamental design for a mail convenience center, as shown. 